As an outstanding optical communication module supplier, Gigac Technology has officially released the 25G and 50G PON OLT series solutions suitable for the next generation of high-speed PON networks. Based on the industry's leading optoelectronic chip technology, it can support higher downlink line speeds of 50G and uplink line speeds of 25G, and the optical power budget covers or is compatible with existing ODN networks. This plan will help operators continuously promote the maximization of fiber optic value, while balancing network evolution and cost, and achieving continuous bandwidth upgrades.

With the continuous promotion of F5G and China's "dual gigabit strategy", 10G PON networks have entered the large-scale commercial stage, providing users with up to 1Gbps bandwidth and achieving gigabit network coverage. However, at the same time, with the further increase in user requirements for network bandwidth and the further enrichment of PON network application scenarios, the productization progress of the next generation of high-speed PON optical modules after 10G PON is becoming increasingly urgent. In 2018, ITU-T/FSAN initiated the standard development work based on single wavelength 50G-PON, named "G.HSP (G.Higher Speed PON)". At the same time, leading PON equipment manufacturers and operators in the industry have jointly launched the 25GS-PON MSA to accelerate the definition of 25G symmetric PON indicators. In 2021, the 50G PON standard G.9804.3 completed the definition of physical layer optical parameter indicators for uplink 50G and downlink 25G asymmetric applications, and plans to complete the definition of physical layer optical parameter indicators for symmetric applications by the end of 2022.

Relying on its strong research and development capabilities in laser chips, Xinrui Technology has successfully developed a high-power 50G 1342nm EML integrated laser chip with integrated SOA and applied it to the upcoming 50G PON OLT optical module product; At the same time, a high-power 25G 1358nm EML integrated laser chip with integrated SOA has been successfully developed and applied to the upcoming 25G PON OLT optical module product. Currently, Xinrui Technology has partnered with Leading PON network equipment manufacturer, conducting 25G/50G PON OLT sample testing.

The standards of ITU-T/FSAN and IEEE for GPON and EPON respectively contribute to the widespread acceptance and deployment of PON. Since 2008, the total shipment volume of 2.5G GPON and 1G EPON OLT ports has exceeded 70 million. The deployment and upgrade of 10G PON are also progressing smoothly. Currently, the cumulative shipment volume of ONT/ONU ports has exceeded 1 billion, and the PON access network market is already very mature. Omdia broadband access leader analyst Julie Kunstler believes that in the growing PON device market, the next-generation PON ecosystem is strong enough to support different and diverse operator strategies and choices. Due to the widespread use of 25G optical devices in the data communication market, 25G symmetric PON is currently a natural choice for utilizing existing mature technology devices, and some operators are deploying 25G PON. 25G PON is implementing new services and applications through the same fiber optic access network as GPON and XGS-PON. On the other hand, 50G PON focuses on 50G PON technology with a single channel rate of 50Gbps, which clearly does not support coexistence with GPON and 10G GPON. Due to the introduction of new application technologies such as optical amplification, DSP, and soft decision forward error correction (FEC), along with the continuous development of the industry chain, It is expected to have commercial deployment capabilities from 2024 to 2025, and 50G PON may become the core of future development and deployment.

Detrine Technology will Taking the lead in releasing high-power EML lasers integrated with SOA and successfully developing a series of solutions for 25G/50G PON OLT optical modules, Xinrui Technology has promoted the industrial development of 25G/50G PON technology, marking a new breakthrough in key component technology in broadband access optical module products. It has further completed the planning and implementation of the next generation of high-speed PON network optical module products, effectively supporting customers and operators in network deployment in the post F5G era.

Detrine Technology's next-generation high-speed PON network optical module solution includes:

1) 50G PON OLT N1/C+: Using QSFP28 packaged optical modules, SC/UPC optical connectors for single fiber bidirectional transmission, 49.7664Gbps and 2x24.8832Gbps NRZ signals for downlink optical and electrical interfaces, and 24.8832Gbps burst receivers for uplink. The downlink adopts a self-developed EML+SOA laser, with a working wavelength of 1340-1344nm and an optical power of up to+8dBm, supporting a 32dB link budget.

2) 50G PON ONU: Equipped with QSFP28 packaged optical modules, SC/UPC optical connectors for single fiber bidirectional transmission, and self-developed DML laser for uplink, with a speed of 24.8832Gbps, operating wavelength of 1290-1310nm, and optical power up to+5dBm, supporting 20km transmission. 

3) 25G PON OLT N1/N2: Using SFP28 encapsulated optical modules, SC/UPC optical connectors for single fiber bidirectional transmission, both downlink optical and electrical interfaces use 25.78125Gbps NRZ signals for transmission, and uplink uses a 25.78125Gbps burst receiver. The downlink adopts a self-developed EML+SOA laser, with a working wavelength of 1356-1360nm and an optical power of up to+6.1dBm, supporting a 31dB link budget. 

4) 25G PON ONU: It adopts SFP28 packaged optical modules, SC/UPC optical connectors for single fiber bidirectional transmission, and self-developed DML laser for uplink, with a speed of 25.78125Gbps and a working wavelength of 1290-1310nm. The optical power is even greater than+4.7dBm and supports 20km transmission.